Page 1543 - Veterinary Immunology, 10th Edition
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VetBooks.ir Heterodimer A molecule consisting of two different subunits.
Heterophile antibodies Antibodies that react with epitopes found
on a wide variety of unrelated molecules.
High endothelial venule A specialized blood vessel lined with
high epithelium, found in the paracortex of lymph nodes and
other lymphoid organs.
Hinge region The region between the first and second constant
domains in some immunoglobulin molecules that permits them
to bend freely.
Histiocytes Tissue macrophages.
Histocompatibility molecules Cell membrane proteins that are
required to present antigen to antigen-sensitive cells.
Homodimer A molecule consisting of two identical subunits.
Homolog A part similar in structure, position, and origin to
another organ.
Homology The degree of sequence similarity between two genes
(nucleotide sequences) or two proteins (amino acid sequences).
Humoral immunity An immune response mediated by antibodies.
Hybridoma A cell line formed by the fusion of a myeloma cell with
a normal antibody-producing cell.
Hypersensitivity Reproducible clinical signs initiated by exposure
to an antigen at a dose tolerated by normal individuals.
Hypersensitivity pneumonitis Inflammation in the lung caused by
a type III hypersensitivity reaction to inhaled antigen within the
alveoli.
Hypervariable regions Areas within immunoglobulin or TCR
variable regions where the greatest variations in amino acid
sequence occur and which therefore bind antigens.
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